Conversion Factors 1 cal = 4.19 J 1 kcal = 4190 J 1 kcal= 1000 cal 1 BTU = 252 cal 1 Joule = 0.239 cal Problem No. 1 How many calories of heat will be needed to raise the temperature of 300g of iron from 30'C to 80 C? The specific heat of iron is 0.11cal/g C Problem No. 2 How much heat does a 35 g of aluminum give off as it cools from 40 .C to 20 .C if the specific of aluminum is c = 880 J/kg oC Problem No. 3 How much heat is required to raise the temperature of 0.5kg of water from 21 C to 40 C? The specific heat of water is 1cal/g C. Problem No. 4 4.5x104 calories of heat is necessary to raise the temperature of 1000g of ethanol from 20'C to 80 C. What is the specific heat of ethanol?CELSIUS FAHRENHEIT KELVIN RANKINE REAUMUR 35 -60 623 136 EXERCISE 1. HOW MUCH HEAT IS REQUIRED TO RAISE THE TEMPERATURE TO 250 ML OF WATER FROM 20 C TO 35 .C. HOW MUCH HEAT IS LOST BY WATER AS IT COOLS DOWN TO 30 .C? 2. How much heat does a 25 g of aluminum give off as it cools from 100 .C to 20 .C if the specific of aluminum is c = 880 J/kg Oc